<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>01-函数式组件</title>
  </head>
  <body>
    <div id="app"></div>

    <!-- 导入 react 主库 -->
    <script src="../js/react.development.js"></script>
    <!-- 导入 reactDom 扩展库 -->
    <script src="../js/react-dom.development.js"></script>
    <!-- 导入 babel 用于将jsx转为js -->
    <script src="../js/babel.min.js"></script>

    <script type="text/babel">
      let str = "我是函数式组件定义的";
      // 定义函数式组件
      function Demo() {
        return <h1>{str}</h1>;
      }

      // 把虚拟DOM渲染到页面上
      ReactDOM.render(<Demo />, document.getElementById("app"));
    </script>
  </body>
</html>
